Young Xehanort, referred to as the Unknown (謎の男 Nazo no Otoko?) and the Mysterious Figure in the North American, PAL, and Final Mix versions of Kingdom Hearts Birth by Sleep, is a boss in Kingdom Hearts Birth by Sleep and one of the main antagonists in Kingdom Hearts 3D: Dream Drop Distance. This version of Xehanort is Xehanort as a teenager and was given the power to travel through and manipulate time itself to help his older self accomplish his goal of containing his essence in thirteen different vessels.